NET

11 They have as king over them the angel of the abyss, whose name in Hebrew is Abaddon, and in Greek, Apollyon.

Darby

11 They have a king over them, the angel of the abyss: his name in Hebrew, Abaddon^D9535, and in Greek he has [for] name Apollyon^D9536.

Darby Bible Notes

Abaddon - Destruction. see Job 26.6; 28.22. Apollyon - i.e. Destroyer.

KJV

11 And they had a king over them, [which is] the angel of the bottomless pit, whose name in the Hebrew tongue [is] Abaddon, but in the Greek tongue hath [his] name Apollyon^K7305.

KJV Bible Notes

Apollyon: that is to say, A destroyer.

Strong's

11 And ^G2532 they had^G2192 a king^G935 over^G1909 them^G848, which is the angel^G32 of the bottomless pit^G12, whose^G846 name^G3686 in the Hebrew tongue^G1447 is Abaddon^G3, but^G2532 in^G1722 the Greek tongue^G1673 hath^G2192 his name^G3686 Apollyon^G623.